discourse: Patch sources instead of using replace-literal

(cherry picked from commit f0ae7fdf7e9518ab1fef4603daa860d5402f5b3b)

pkgs/servers/web-apps/discourse/default.nix

@@ -199,6 +199,10 @@ let
       # Log Unicorn messages to the journal and make request timeout
       # configurable
       ./unicorn_logging_and_timeout.patch
+
+      # Use mv instead of rename, since rename doesn't work across
+      # device boundaries
+      ./use_mv_instead_of_rename.patch
     ];
 
     postPatch = ''
@@ -207,8 +211,6 @@ let
       # warnings and means we don't have to link back to lib from the
       # state directory.
       find config -type f -execdir sed -Ei "s,(\.\./)+(lib|app)/,$out/share/discourse/\2/," {} \;
-
-      ${replace}/bin/replace-literal -f -r -e 'File.rename(temp_destination, destination)' "FileUtils.mv(temp_destination, destination)" .
     '';
 
     buildPhase = ''

pkgs/servers/web-apps/discourse/use_mv_instead_of_rename.patch

@@ -0,0 +1,22 @@
+diff --git a/lib/discourse.rb b/lib/discourse.rb
+index ea2a3cbafd..66454d9157 100644
+--- a/lib/discourse.rb
++++ b/lib/discourse.rb
+@@ -62,7 +62,7 @@ module Discourse
+         fd.fsync()
+       end
+ 
+-      File.rename(temp_destination, destination)
++      FileUtils.mv(temp_destination, destination)
+ 
+       nil
+     end
+@@ -76,7 +76,7 @@ module Discourse
+       FileUtils.mkdir_p(File.join(Rails.root, 'tmp'))
+       temp_destination = File.join(Rails.root, 'tmp', SecureRandom.hex)
+       execute_command('ln', '-s', source, temp_destination)
+-      File.rename(temp_destination, destination)
++      FileUtils.mv(temp_destination, destination)
+ 
+       nil
+     end